Fine pulverized coal recycling system for pulverized coal pyrolysis and utilization method of fine pulverized coal recycling system

A fine coal powder, pyrolysis technology, applied in the direction of indirect heating dry distillation, direct heating dry distillation, special form of dry distillation, etc., can solve the problem of a large amount of dusty waste gas, etc., achieve low oxygen content, small particle size, and energy saving effects

Pending Publication Date: 2021-10-19
南阳三鑫诚达化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, the existing low-rank coal pyrolysis process mainly uses pulverized coal pyrolysis equipment for segmental pyrolysis, and a large amount of dusty waste gas will be produced during the pulverized coal pyrolysis process

Method used

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  • Fine pulverized coal recycling system for pulverized coal pyrolysis and utilization method of fine pulverized coal recycling system
  • Fine pulverized coal recycling system for pulverized coal pyrolysis and utilization method of fine pulverized coal recycling system
  • Fine pulverized coal recycling system for pulverized coal pyrolysis and utilization method of fine pulverized coal recycling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a system for recovering and reusing fine coal powder contained in raw coal gas from pulverized coal pyrolysis includes a pulverized coal pyrolysis device 1, a high-temperature coarse dust collector 2, a high-temperature fine dust collector 3, a high-temperature coarse dust collector 2 and a high-temperature The bottom outlet of the fine dust collector 3 is equipped with the first fine coal dust collection tank 4 respectively, and the bottom ash outlet of the first fine coal dust collection tank 4 is connected with the screw conveyor 5 respectively, and the discharge of the screw conveyor 5 The second fine coal dust collection tank 6 is installed in the port, and the discharge port of the second fine coal dust collection tank 6 is connected with the coal powder injection device 8 through the cooler 7, and the air inlet of the coal powder injection device 8 is connected with The first flue gas booster 9, the discharge port of the pulverized coal...

Embodiment 2

[0027] Such as figure 2 As shown, the pulverized coal pyrolysis device 1 is a pulverized coal pyrolysis rotary kiln, and the flue gas generated by the process heating furnace is mixed with the flue gas from the temperature regulation pipeline and enters the pyrolysis section of the pulverized coal pyrolysis rotary kiln. All the other are the same as the first embodiment.

Embodiment 3

[0029] Such as image 3 As shown, the discharge port of pulverized coal pyrolysis device 1 is also equipped with a heat exchanger 15, and the flue gas produced by the process heating furnace 10 is mixed with the flue gas of the temperature regulation pipeline and enters the heat exchanger 15 to be mixed with the solid Heat exchange of materials, so that the solid materials undergo secondary pyrolysis, the flue gas after heat exchange by the heat exchanger 15 enters the pyrolysis section of the pulverized coal pyrolysis rotary kiln, and the dust-containing waste gas generated by the pyrolysis of solid materials enters the high-temperature The coarse dust collector, then enters the high temperature fine dust collector. All the other are identical with embodiment two.

[0030] In this embodiment, by installing a heat exchanger at the discharge port of the pulverized coal pyrolysis device, the high-temperature flue gas generated by the process heating furnace enters the heat exch...

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Abstract

The invention relates to a raw gas dust recycling system and method for pulverized coal pyrolysis, and belongs to the technical field of pulverized coal pyrolysis. The raw gas dust recycling system specifically comprises a high-temperature coarse dust remover and a high-temperature fine dust remover, and a bottom discharge port of the high-temperature fine dust remover is connected with a spiral conveyor through a first dust collecting tank; a discharge port of the spiral conveyor is connected with a pulverized coal injection device through a second dust collecting tank, a discharge port of the pulverized coal injection device is connected with a process heating furnace through a pipeline, one part of low-temperature flue gas discharged by the pulverized coal pyrolysis device enters a desulfurization and denitrification system, and the other part of the low-temperature flue gas enters the pulverized coal injection device through a flue gas recycling pipeline; and a temperature adjusting pipeline is further arranged on the flue gas recycling pipeline, and the temperature adjusting pipeline is connected with a flue gas chamber of the process heating furnace. The system is simple in structure and convenient to use, can effectively solve the problem of utilization of fine pulverized coal contained in the low-rank pulverized coal pyrolysis raw gas, realizes on-site utilization, improves the utilization rate of the pulverized coal, fully utilizes effective resources, and reduces the investment and operation cost of the device.

Description

technical field [0001] The invention relates to a fine coal powder recovery and reuse system for pyrolysis of pulverized coal and a utilization method thereof, belonging to the technical field of pyrolysis of pulverized coal. Background technique [0002] Coal is the main energy source in my country for a period of time. In 2006, China's coal reserves amounted to 1.0345 billion tons, and the remaining proven recoverable reserves accounted for about 13% of the world's total, ranking third in the world, of which low-rank coal reserves accounted for about 57%. In recent years, my country has developed more than 3 billion tons of coal every year, more than half of which are low-rank coals. At the same time, my country's coal utilization is relatively simple, mostly used for combustion and power generation, and the oil and gas resources in coal are burned in a simple form, which does not conform to the principle of "high quality for high use, low quality for low use". At the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/02C10B57/10C10B47/00C10B49/02C10K1/02
CPCC10B53/04C10B57/10C10B57/02C10B47/00C10B49/02C10K1/02C10K1/024C10K1/002
Inventor 白太宽
Owner 南阳三鑫诚达化工科技有限公司
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